Welcome to our dedicated page for Calamos Strategic Total Return SEC filings (Ticker: CSQ), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
calamos investments is a diversified global investment manager committed to excellence in investment management and client service. calamos was founded in 1977 by john p. calamos, sr. who sought innovative, risk-managed approaches to grow and preserve capital. today the firm is recognized as a pioneer in utilizing convertible securities and alternative investments to manage risk, and has retained its character as a boutique investment firm. headquartered in the chicago metropolitan area, the firm also has offices in london, new york, san francisco, and the miami area. calamos offers strategies through separately managed portfolios, mutual funds, closed-end funds, private funds and ucits funds. clients include major corporations, pension funds, endowments, foundations and individuals, as well as the financial advisors and consultants who serve them. for more information, please visit www.calamos.com.John S. Koudounis filed an amended Form 3 reporting his beneficial ownership in Calamos Strategic Total Return Fund (CSQ). The amendment updates his relationship to the issuer: he is listed as an officer (Vice President) and as a trustee effective 09/01/2025. The statement shows 15,830 shares of common stock owned directly. The amendment references an original filing dated 07/11/2016 and is signed on 09/09/2025.
John S. Koudounis filed an amended Form 3 reporting initial beneficial ownership in Calamos Strategic Total Return Fund (CSQ). The filing shows 15,830 shares of common stock held directly. The amendment updates his relationship with the issuer to reflect that he is an officer (Vice President) and became a trustee effective 09/01/2025. The form is signed and dated 09/09/2025 and contains no derivative holdings or other transactions.
The filing is an amendment to a Schedule 13G reporting that a group of related Apollo entities and Athene Annuity and Life Company collectively hold 1,920,000 Series F Mandatory Redeemable Preferred Shares of Calamos Strategic Total Return Fund. That holding represents 48.0% of the 4,000,000 MRPS outstanding (per the issuer's certified shareholder report dated April 30, 2025). No reporting person claims sole voting or dispositive power; each reports zero sole power and shared voting and dispositive power over 1,920,000 shares. The filing states the securities were acquired and are held in the ordinary course of business and not to change or influence control of the issuer.
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